Because we have global manufacturing operations, including wafer fabrication and assembly and test, we recognize the importance of using renewable electricity to power our facilities. Renewable electricity is also an important component of our roadmap to carbon neutrality.
We purchase renewable electricity when available, and continue to purchase electricity from fossil-fuel sources in jurisdictions where reliable and abundant alternative energy sources are not available.
Primary sources of energy for our manufacturing, testing and office sites come from the electrical grid. Our ongoing efforts to conserve electricity and optimize our manufacturing processes have helped us use electricity more efficiently.
We produce increasingly complex products that involve many more processing steps, requiring greater electricity consumption. Compared to 2014, our absolute electricity consumption has increased only 11%. In 2023, our absolute electricity consumption decreased by 1% compared to 2022.
2023 Manufacturing Electricity Consumption
Semiconductor manufacturing is an electricity-intensive process, with wafer fabrication requiring more electricity than assembly and test. Electricity consumed at our non-manufacturing sites accounts for only 3% of NXP's total consumption.
2023 Manufacturing and Non-Manufacturing
Electricity Consumption
Our manufacturing sites continually optimize processes and replace or upgrade equipment. We aim to achieve our renewable electricity goal through power purchase agreements, the use of unbundled renewable energy certificates (iRECs) and, in select cases, self-generation.
Since 2015, we have steadily increased our use of electricity that comes from renewable sources. Overall, our renewable electricity usage increased by 4 percentage points compared to 2022, to a total of 39% renewable electricity for the company overall in 2023. Since we set our renewable energy target in 2021, our renewable electricity usage has increased by 9 percentage points.
We use natural gas to power heating, cooling and humidity-management equipment critical to manufacturing and test processes and diesel fuel for emergency generators. The emissions from these fossil fuels are included in the totals of our Scope 1 emissions.
We mostly use natural gas to heat buildings, generate steam for humidity and run our emissions-abatement equipment. Our use of natural gas depends strongly on both external weather and our internal production activity. Our consumption has remained relatively stable over the past few years, but has increased in part due to factory expansion. In 2023, our absolute natural-gas consumption decreased 1% compared to 2022, however consumption increased by 2% compared to our baseline year, 2021, and by 5% compared to 2014.
In case of power interruptions, we have diesel-driven emergency generators that support essential safety systems. Our consumption of diesel fuel fluctuates depending on how often we test or need to use these emergency safety systems. We used 25% less diesel in 2023 compared to 2022 and 64% less since our baseline year, 2021.
Other fossil fuels we use include gasoline, liquefied petroleum gas (LPG) and town gas. LPG is a relatively clean-burning fossil fuel that, compared to gasoline, produces fewer emissions and is safer to use indoors. We use LPG to run forklifts and in some of our onsite cafeterias. Town gas, also known as coal gas, is a manufactured gaseous fuel made from coal and is used for heating in some geographic regions, including Asia. In 2023, our consumption of other fossil fuels decreased by 23% from 2022, but has increased by 54% since 2014. Since our 2021 baseline, other fossil fuel emissions have increased by 5%.
We are here to answer any inquiry regarding our corporate sustainability efforts, including EHS and environmental product compliance.